Big Horn, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Horn, a community in Sheridan County, Wyoming.
Overnight
44°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 44. Wind around 0 mph.
7-day forecast for Big Horn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Patchy Smoke | 0 mph | 0% |
| Tuesday | 75°F | Patchy Smoke | 0 to 7 mph ENE | 3% |
| Tuesday Night | 52°F | Patchy Smoke | 1 to 7 mph WSW | 15% |
| Wednesday | 84°F | Sunny | 1 to 6 mph NNE | 0% |
| Wednesday Night | 56°F | Mostly Clear | 5 mph WSW | 0% |
| Thursday | 91°F | Sunny | 0 to 8 mph N | 1% |
| Thursday Night | 60°F | Mostly Clear | 3 to 7 mph W | 0% |
| Friday | 96°F | Sunny | 1 to 7 mph N | 0% |
| Friday Night | 62°F | Mostly Clear | 7 mph W | 0% |
| Saturday | 96°F | Sunny | 6 to 14 mph NNW | 1% |
| Saturday Night | 63°F | Mostly Clear | 3 to 7 mph WSW | 0% |
| Sunday | 95°F | Sunny | 5 to 10 mph NW | 5% |
| Sunday Night | 63°F | Partly Cloudy | 6 mph WNW | 3% |
| Monday | 92°F | Mostly Sunny | 3 to 9 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov) for Big Horn (44.679, -106.997). Updated through the day.
Growing snapshot for Big Horn
Last spring frost
May 24
First fall frost
Sep 23
Growing season
120 days
Hardiness zone
5a
More local growing data for Big Horn: nearby ZIP 82842 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Story, Wy (1.7 mi from Big Horn). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.